Casting-mold



F. HACHE/NWN.

CASTING MOLD. APPucATzon .":LED APR, 2, 1917. REmwED-APR. 1?, 1920.

2 SHEETS-SHEET l.

wfg).

FREDERICK HACHMANN, OF ST. LOUIS, MISSOURI, ASSIGNOR,BY :DIRECTy AND MESNE ASSIGNMENTS, OF ONE-FOURTH TO JOHN A. DOWDALL AND ONE-FOURTH TO IBER- N'ARD GREENSFELDER, BOTH O'F ST. LOUIS, MISSOURI, AND ONEHALF- TO NA- TIONAL METAL DIE MOLD COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

"CASTING-MOLD.

Specic'ationof LettersPatent. t Patented Oct. 26,

Application tiled April 2, 1917, Serial No. 159,297. Renewed ApriI 17. 1920. Seria1-No. 374,751.

To all 'whom 'it may coi/wem Be lit known that I, FREDERICK HAcH- MANN, a citizen of the United States, and Yre-A siding at StpLouis, Missouri, have invented the new and useful Improvement 1n Casting-Molds, of which the following is a speci ication.

This invention relates to casting molds, and more particularly to molds for casting metals.

In application Serial No. 159,236, filedl April 2,' 1917, executed of even date herewith, there is described a casting mold, provided with venting passages to insure withdrawal of the gases fromthe mold cavity, and provided with lubricant conducting passages adapted to supply to and maintain on the walls of the mold cavity, a lubricant, so. as to'prevent adhesion of the metal to the mold. In the particular embodiment described in said application,

` these passages are formed in the body of the mold; it is, therefore, necessary to subdivide the mold into a series ofblocks in order that the' small passages may be cut into the faces of the blocks.V Such a construction is, however, expensive, 'difficult to make, and dflicultv to keep in repair.-

Some of the objects of, this invention, therefore, are to develop a casting mold of the above type, in which the venting'and lubricating passages are formed in such a manner as to cheapen the construction of the mold, and so as to permit accurate and reliable operation. 4 Further objects will appear from the detail description taken in connection with the accompanying drawing, in which,

Figure '1 is a plan of a mold embodying this invention; p

Fig. 2 is a section on the line 2-2, Fig. 1;

Fig.` 3 is an elevation of one of the'mold sections, taken on the line 3-3, Fig. 1;

Figc'i LLis a section on the line le-4, Fig. 1; an 1 Figs. 5 and 6 are details of one of venting elements or plates.

\ In accordance with this invention,

vnting and lubricating passages are' formed in separate elements or plates, which arey slet into the mold body, These plates 'are arthe i a vertical channel 13, and a series of downwardly directed capillary grooves 14, lead-`v ing from the mold cavity to'the channel 13.'-

the

ranged in pairs with the venting passagesvv formed in the outside faces, and with :the lubricating passages formed in the inside faces of these v,plates or elements. In order to secure these plates in position, there is provided for each set ofy plates, a locking bar set into the mold body and the ends of the plates, so as to securely retain these plates in cooperative relation. The lubricant-receiving pockets formed in the mold body are open ended, and closed at their' vlower ends by plugs, so as to permit the Ication referred to.

Formed in the mold section 1and spaced around the mold cavity, so as to follow the contour thereof, is a series of pockets 7, adapted to receive the lubricant, such as oil,

and the lubricant-carrying vehicle, whichV as in the application referred to, is a granular porous carbon free from graphite. Formed in the mold section 2 is a-central pocket 8 for also receiving the lubricant and itsy vehicle. The pockets are open at their lower ends, andv arepclosed by plugs 9 y and 10 respectively, so as to permit the bottoms to be opened in order to facilitate removal of the lubricant and its vehicle, this being accomp ed by blowing the carbon out with an airlast.

Formed in themold section 2 is a series of slots 11, adapted toreceive plates 12, shown in Figs and 6. Each of theseplates has formed in the outside surface'thereof,

The channelsl inthe diferentplates dis-i charge into a ScmibirCu-Iar channel l5, which connects at its ends with channel 16, run-` ningto the outside of the mold section 2,'so as to side air. The inside or engaging faces of the plates V12, have formed' therein, upf' wardly extending 17, the grooves' in a pair of plates cant-conducting channels extending downwardly from the pocket Sto the mold Formed inXthef part 3 of the moldasection 2 is a'yseries of slits r18, leading` fro the grooves junctionof the plates '.,12 `to the pocket 8,

retain the plates 12 in section 2, the lower part of this sectlon-is v so.' as to form continuations lof thechannel 17. There 1s thus formed a series of downwardly directed llubricant-conducting` chan-k nels between the 'pocket and the mold cavity, as clearly shown in Fig. 2. In order to place inthe mold be in free communication with the out.

forming capillary lubria insure that the capillary passages' avity. unobstructed theY therein, adapted to receive a semi-circular' bar 21, which is set into that part and into the notches 20, formed `in the ends of the i plates 12, and this bar is retained in posiventing passages 27',

; case, both the upper and lower facesof the4 tion by screws 22. The plates are thus firmly held in coperativerelation inthe mold sections.

vSet into slots 220 in the mold section 1 are plates- 23, which are similar" in construction to plates 12. The outside faces of these lates 23 have formedtherein, vertical channels 24, leading into a circular channel 25,

connected by channels 26 with the outside' air, and these outside faces have alsoform'ed therein, downwardly ,extending 'capillary connecting the mold cavity with these vertical venting channels '24. The inside engaging faces of the plates 23, have also formed'therein, 'alining cap1l'` lary lubricant-conducting passages 28,' which connect the mold cavity with slots 29, lead-f` to connect the 7, so as In this ing .to the pockets these pockets'.

mold cavity with mold section 1 are channeled or cut, and both ends ofthe plates `223 are notched to receive rings 30, whichzare secured in position by screws 31, so as to securely lock the plates 23 in 'coperative relation in the mold section. In order to provide for agate, the top of the mold has attached thereto, a plate 31, which` is beveled, as shown at 32, so as to permit ready entrance of the metal.' lPhe faces 33 of section 1 are also provided with capillaryventing passages 27 and channels 24,` the l .tter discharging into the channels 25. y l 'Y In the construction of these mold sections,

, the mold-section bodies are finished appr'pximately to form, and' slotted t0 receive. the

`The whole Y is 'castingv ,to the mold is,

lt is, therefore,

plates 12 and 23.` These plates are then' grooved and set in. position in their slots, and locked in position by their retaining bars. then finished, so as to form smoothiinside mold cavity faces, The plates` are' then again removed and carefully cleaned, so' as to remove burs, andso as to' and 28, will be open and plates are .then replaced. u

Theopematn and utility 0e the mola casting will, of cou-rse,'be obvious fromthe ap-l plicationreferred to. The pockets contant" ing the lubricant retaining vehicle are filled with thelubricant, such as a high iash point mineral oil, and uthis 4lubricant isaiso pre- As the metalis poured into r the mold, the air and other-gases escape passages, so as to produce through the venting e lubricant is, of course,

a clean casting.

maintained on the faces of 'the mold cavity, l'

so as to replace the lubricant volatilized duringthe casting operation. Adherence of the therefore, prevented. 'lVith this construction, the cost of -producing the mold is very much reduced, as the plates 12 and 23 can lbe readily formed by niaj chines to accurate form. The mold, mores' over,.is of rugged 'and solid construction, and Will last practically indefinitely. The utmost' accuracy can `be obtained Withthis construction. The construction of the carbon pockets, permitting ready removal. of

the spent carbon, is advantageous, 'since such carbon must be removed at intervals.

It is obvious that various changes may.` he made in the details of construction without departing from the vspirit of this` invention. to be understood that this invention is not to be limitedto the speciiic construction shown and described.

.-Having thus describedthe invention, what i,

is claimed is:` K

' l. A casting mold, comprising, a mold body having a cavity adapted to 'form a cast ing, an element constructed and arranged in saidI body to form venting means, adapted to insure escape of the gases from said cavity I during the casting' operation, and a series of lubricant 'passages 1n said element adapted fto conduct a lubricant to the Walls of said 2. A casting mold, comprising, a mold body having a cavity adapted to form a' casting, arranged in said 'body to form' venting l'neansadapted to insure escape of the gases from said cavity during the casting operation, and a series of passages in said elea series of elements constructed and use means, adapted to insure escape of the gases from said cavity during the casting operai' tion, passages-in4 said "elements adapted to apply a lubricant to the Walls of said cavity, and-means for lockingsaid elements in position.

4;. A casting mold, comprising, a mold body having -a cavity adapted to form a casting, and an element constructed and arranged in said body to form lubricantcon ducting passages leading to said cavity, adapted to apply a lubricant to the Walls of said cavity.

A casting mold, comprising, a mold body having a cavity adapted to form a casting, and a plate arranged in said body and grooved to provide passages connected with said cavity, certain of said passages being adapted to-insure escape of the gases from said cavity during the casting operation, and certain of said passages being adapted to apply lubricant to the Walls of said cavity, substantially7 as and for the purpose set forth.

6. A casting mold comprising, a mold body having a cavity adapted to form a casting, and a plate arranged in said body and grooved on its opposite faces to provide passages connected vvith said cavity substantially as'and yfor the purpose set forth.

casting. mold, comprising, a mold body having a cavity adapted to form a casting,

downwardly eX- tending grooves and having on the other face lupwardly extending grooves, arranged to provide passages 'connected With said `cavity, substantially as and for the purpose set forth.

8. A casting mold, comprising, a mold bodvhaving a cavity adapted to form a casting, and a plate arranged in said body and having an outlet channel and having grooves connecting said cavity with' said channel, constructed and arranged to form venting passages and adapted to insure Withdrawal of the gases from said cavity during the casting operation.

9. casting mold, comprising, a mold body having a cavity adapted to form a casting, and a pair of plates arranged side 'by side in said body andhaving series of grboves therein to form passages connected 'with said cavity, substantially as and for the purpose set forth.

l0. A castingl mold, comprising, a mold bqdy having a cavity adapted to form a 'i casting, a pair of plates .arranged sidejoy side in saidbody and having seriesgf Igrooves and a platel arranged in said body and having on one face cant, and a therein to form passages connected with said cavity, and means for locking sald plates in position. i y l 11. A casting mold, comprising, a mold body having a cavity adapted to form a casting, and a pair of plates, grooved on their engaging faces, and arranged in said body engaging faces and grooved on their. out.

side faces to form passages connecting With said cavity.

13. A casting mold, comprising, a moldv body having a cavity adapted to form a casting, said bod having a pocket adapted to receive a lubricant, and an element conf structed and arranged in said body to form passages connecting said cavity with said pocket.

14. A casting mold, comprising, a mold body having a cavity adapted to form a casting, said body having a pocket adapted to receive a lubricant, and a plate arranged in said body, form passages said pocket.

15,'A casting mold, comprising, a mold body having a cavity adapted to forni a casting, said body having a pocket adapted to receive a lubricant, and a arranged in said body, grooved on their engaging faces to form passages connecting said cavity With said pocket.

16. A casting mold, comprising, a mold body having acavity adapted to--form a casting, said body having an air channel and having a pocket adapted to receive a lubricant, and a plate arranged in said body, said plate being grooved on one face to providev venting passages connecting said cavity With said channel, and said plate being grooved on the other face to form connecting said cavity with said pocket.

17. A. casting mold, comprising, a mold body having a cavity adapted to form a casting, said body having an air channel and having a pocket adapted to rcceive'a lubripair of plates arranged in said body, said plates' being'grooved on their engaging facesl to form venting passages connecting said cavity with said channel, and said plates being side faces to form passages connecting said cavity With said pocket.

18. A casting mold, comprising, a mold body having a cavity adapted to'form' a casting, aseries of plates constructed and arranged in said body to form passages con? nected- With said cavity, and a bar adapted connecting said cavity with grooved on their outsaid plate being -grooved to l pair ofvplates said plates being passages to retain said plates in coperative relation.

.adapted bo relation.

body having' a cavity adaptedlto'folrm a casting, 'a series of plates `constructed and -arrangedin said body." to form passages con- 20. A oasting mo1d,oomprising, a ln'old body having oavity adapted to` form a casting, said l said- Cavity `with said pocket.

i' ,21.`A casting' mold, eolnprlsing a *mold` l bodyjhaving 'a cavity adapted bo form a ldy 'having an open ended(v pocket adapted-izoreceivea lubricant, a'plug x r for 'said pocket, "and passages conneehing,f'passagesf` InteSt1110 .y

V*fairefthisl'st i s. HACHMANN.V

casting, a `lubricant receptacle in mold Y* `body, and passages from said receptacle through the mold Wall and opening into the i mold cavity for conducting the lubricant to 'the Wall of the mold cavity.v j

.22. A casting mold, compu mgia-rnold body having a cavity adapbed,gtof"orm. a

' casting, a plurality of passages Vtinfnlg1-1 the mold wall oroondnoting-liibrieantogthe day of 

